/*
 * Copyright (C) 2005 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "misc"

//
// Miscellaneous utility functions.
//
#include <utils/misc.h>
#include <utils/Log.h>

#if !defined(_WIN32)

#endif

#include <utils/Vector.h>

using namespace android;

namespace android {

    struct sysprop_change_callback_info {
        sysprop_change_callback callback;
        int priority;
    };

#if !defined(_WIN32)
    static pthread_mutex_t gSyspropMutex = PTHREAD_MUTEX_INITIALIZER;
    static Vector<sysprop_change_callback_info> *gSyspropList = NULL;
#endif

    void add_sysprop_change_callback(sysprop_change_callback cb, int priority) {
#if !defined(_WIN32)
        pthread_mutex_lock(&gSyspropMutex);
        if (gSyspropList == NULL) {
            gSyspropList = new Vector<sysprop_change_callback_info>();
        }
        sysprop_change_callback_info info;
        info.callback = cb;
        info.priority = priority;
        bool added = false;
        for (size_t i = 0; i < gSyspropList->size(); i++) {
            if (priority >= gSyspropList->itemAt(i).priority) {
                gSyspropList->insertAt(info, i);
                added = true;
                break;
            }
        }
        if (!added) {
            gSyspropList->add(info);
        }
        pthread_mutex_unlock(&gSyspropMutex);
#endif
    }

    void report_sysprop_change() {
#if !defined(_WIN32)
        pthread_mutex_lock(&gSyspropMutex);
        Vector<sysprop_change_callback_info> listeners;
        if (gSyspropList != NULL) {
            listeners = *gSyspropList;
        }
        pthread_mutex_unlock(&gSyspropMutex);

        //LOGI("Reporting sysprop change to %d listeners", listeners.size());
        for (size_t i = 0; i < listeners.size(); i++) {
            listeners[i].callback();
        }
#endif
    }

}; // namespace android
